*{
    margin: 0 auto;
    padding: 0;
    border: 0;
}
body{
    background-color: aliceblue;
}
.btn-div{
    float: right;
}
.default-sign {
    position: absolute;
    padding: 0.625rem;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    height: auto;
    width: 80%;
    overflow: hidden;
    box-shadow: 0 0 20px 0 rgba(175, 231, 123, 0.4);
    background: #ffffff;
    box-sizing: border-box;
    border-radius: 16px;
}